(19)
(11) EP 0 903 945 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.08.1999 Bulletin 1999/34

(43) Date of publication A2:
24.03.1999 Bulletin 1999/12

(21) Application number: 98123716.7

(22) Date of filing: 23.12.1993
(51) International Patent Classification (IPC)6: H04N 7/30, H04N 7/36, H04N 7/50, G06T 9/00
(84) Designated Contracting States:
DE FR GB NL

(30) Priority: 25.12.1992 JP 346552/92
25.02.1993 JP 36371/93
23.08.1993 JP 207842/93

(62) Application number of the earlier application in accordance with Art. 76 EPC:
93120766.6 / 0603878

(71) Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
Tokyo 100-8310 (JP)

(72) Inventors:
  • Murakami, Tokumichi Mitsubishi Denki K. K.
    Kamakura-shi, Kanagawa 247 (JP)
  • Kato, Yoshiaki Mitsubishi Denki K. K.
    Kamakura-shi, Kanagawa 247 (JP)
  • Shimada, Toshiaki Mitsubishi Denki K. K.
    Kamakura-shi, Kanagawa 247 (JP)

(74) Representative: Pfenning, Meinig & Partner 
Mozartstrasse 17
80336 München
80336 München (DE)

 
Remarks:
This application was filed on 10 - 12 - 1998 as a divisional application to the application mentioned under INID code 62.
 


(54) Interframe coding system and method


(57) An interframe coding system for frame-to-frame coding of an input signal (12), having a local decoding loop which includes an encoder (4) for interframe coding the input signal, decoding means (5) for producing a decoded signal (18), and a frame memory (1) which receives the decoded signal and outputs a predicitive signal (14). The system further comprises a controller (21a) for receiving the input signal and the predictive signal from the frame memory, for calculating a difference between the input signal and the predictive signal, for calculating a characteristic of the input signal and for generating a coding control signal (25) based on the difference and the characteristic for controlling the encoder.






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